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GENITOURINARY AND OBSTETRIC RADIOLOGY Table of Contents   
Year : 2013  |  Volume : 23  |  Issue : 3  |  Page : 266-268
Validation of the global reference for fetal weight and birth weight percentiles


1 Director, Chikitsa Ultrasound Training and Research Centre, Mumbai, India
2 FRCOG Consultant in Maternal - Fetal Medicine and Obstetrics Fetal Medicine Unit St. George's Hospital, London, United Kingdom
3 Nowrosjee Wadia Maternity Hospital, Mumbai, India

Correspondence Address:
Anirudh B Badade
Director, Chikitsa Ultrasound Training and Research Centre, Balkrishna Centre, N.G Acharya Marg, Chembur Station, Mumbai
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0971-3026.120270

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The objective of this study was to evaluate whether the global reference curves adapted on the basis of WHO data for India and the Hadlock reference curves fit the population in India and to validate the reference curves. The data were retrieved retrospectively from the records of women registration for antenatal care at a charitable maternity hospital in Mumbai, India. All pregnancies were dated on CRL obtained before 14 weeks. Births before 34 th week were excluded. The expected frequencies of birth weights below the 1 st , 5 th , 10 th , 50 th , 90 th , 95 th and 99 th centiles from three reference ranges were compared with observed frequencies. It was found that the WHO generic reference adapted to India significantly underpredicted the birth weights and that the Hadlock reference ranges significantly overpredicted the birth weights. The use of generic reference adapted to Sri Lanka showed a better fit to the observed data. We concluded that global reference curves adapted on the basis of WHO data for India and the Hadlock reference ranges do not fit all the population in India and the charts need validation. Reference charts modified on the basis of data for Sri Lankan population show a better fit to the observed data, and therefore are more appropriate for use in clinical practice in South India.


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